Automatic gas-saving attachment for gas-stoves.



L. H. BEAR.

AUTOMATIC GAS SAVING ATTACHMENT FOR GAS STOVES.

APPLICATION FILED NOV. 10, 1910. 1 090 094. Patented Mar. 10, 191 1 COLUMBIA PLANOGRAI'H cu. WASHINGTON. 2. c

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LEWIS II. BEAR, DE LOS ANGELES, CALIFORNIA, ASSIGNOR 'IO BEAR AUTOMATIC GAS STOVE CO, 015 LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

AUTOMATIC GAS SAVING ATTACHMENT FOR GAS-STOVES.

To all echo/12. it may concern:

Be it known that I, LEWIS H. BEAR, a citizen of the United States, residing at Los Angeles, .in the county of Los Angeles and State of California, have invented new and useful Improvements in Automatic Gas-Saving Attachments for Gas-Stoves, of which the following is a specification.

This invention is an improvement over the attachment for gas stoves patented to me Feb. 23, 1904-, by Letters Patent of the United States, No. 7527 19.

An object of this invention is to provide an automatic gas saving cut-off for gas stoves which is inconspicuous as an attachment; in which the use of springs is dis pensed with and the liability of getting out of adjustment is minimized; and in which the valve is practically frictionless and is constructed to avoid the necessity of any stuffing box.

Further objects are cheapness of manufactnre, case of assembling the parts, and ease of installation in the stove.

The invention relates to the construction and arrangement of the valve head and valve, the means for operating the valve and the construction and ar 'angement of the stove frame and the means for mounting the head and operative parts on the stove frame.

The accompanying drawings illustrate th invention.

Figure 1 is an elevation partly in section on line a: -:r, Figs. 2 and 4-, of a gas stove provided with this invention as it appears when the pilot valve is open, the pilot pipe lighted, the cut-off valve closed and the main burner extinguished. Fig. 2 is a fragmental broken plan of the invention partly in section on line :0 Figs. 1 and 1. Fig. 3 is a fragmental vertical section on line indicated by m -m Figs. 9. and 4-. The cut-off valve being open. Fig. at is a broken fragmental front elevation partly in section on line ar -00, Fig. 1. Fig. 5 is a fragmental sectional elevation from line ca -50 Fig. 1 looking toward the left. Fig. 6 is an enlarged fragmental detail, in elevation, of the joint between the upper limb and the link of the compound lever that operates the cut-off valve. Fig. 7 is a perspective View of the bracket detached.

Specification of Letters Patent.

Application filed November 10, 1910.

Patented Mar. 10, 191st.

Serial No. 591,709.

The stove frame 1 is provided in front and behind the burner opening 2 with notches 3, l, to receive the front and rear spider lugs 5, G, that project laterally at the front and rear of the spider 7; there being a pair of front lugs 5 and a pair of rear lugs (S; the spider otherwise being of the same construction as those in common use in gas stoves.

The notches 3 and 1- are cut into the inner upper corners of the frame 1. The front notches are open at the top and l aek and the rear notches are open mainly at the front; the frame 1 being made of angle iron and the notches being cut into the corners as shown so that the front edge of the spider may be raised and lowered while the rear edge of the spider is pivotally supported by the lugs in the rear notches at so that the spider is free and detached from the stove frame and other parts may be readily removed while the stove is being cleaned. By this construction of the spider and frame, the spider is delicately pivoted so as to be easily moved by the weight of light aluminum cooking utensils as well as the heavier utensils. The ends of the lugs 5 and G are rounded on their upper sides to allow the cooking utensil to be shoved on readily from the front and to allow the pivotal action at the rear without interference at the top of the angle iron frame under the top limb of which the rear limbs extend.

A bracket 8 is bolted to the front rail of the frame and a valve head or block 9 is fastened to the bracket by longitudinally perforated screw-threaded plugs 10 and 11 that have heads 19. and 13. that are inserted through holes in said bracket and that are screwed into the head 9, which is provided with a bore 14% forming a vertical gas-Way communicating with the bores of the plugs 10 and 11 and with the nipple 15 of the gas supply pipe 16; said nipple 15 being con trolled by the usual valve 17. The heads 12,

13, engage the front wall of the bracket 8,

and hold the head 9 firmly in place against such front wall when the plugs are screwed home.

The head 9 is provided with a screwthreaded orifice 18 into which is screwed the pilot light valve 19 that is a conical pointed screw-threaded plug, the inner end of which is adapted to close the axial bore of the pilot light plug 10 into the head end of which is screwed the pilot light pipe 20. The cut-off valve 21 slidingly fits an enlarged portion 22 of the bore which forms the gas-way 14, and is provided with a reduced tip 23 the end of which is conical forming a valve face to fit a conical seat 24 to close the passage through such bore from the nipple 15 to the plug 11 which forms the jet piece or nozzle that discharges gas into the air mixer 25 which receives air through the orifices 26 in the front wall of the bracket 8 said orifices controlled by the shutter 27 in the usual manner.

The bracket 8 is bent from a single piece of sheet metal and comprises the front wall 28, side arms 29 and ears 30 at the tops of said side arms. The front wall is provided with holes 31, 32, through which the bodies of the plugs 1.0 and 11 insert. Said bodies are provided with cylindrical portions 33 next to their heads to fit the holes 31, 32, and also to fit spacers 31, 35, which are arranged around said bodies outside the bracket to hold the bracket wall 28 and the valve block 9 spaced apart to receive between them the shutter 27 having the openings 36 and that turns on the spacer which surrounds the main plug 11 that constitutes the nozzle for injecting gas into the air mixer 25 and discharging it through the usual pipe a to the usual gas burner b centrally located below the tilting spider 7 The front bar 37 of the spider rests upon the free end of the upper member 38 of a compound lever that is fulcrumed to the bracket arms 29 and consists of three U- shape members 38, 39, 10. The upper and lower members 38 and 40 are fulcrumed by pins ll, 42, respectively, to the tops and bottoms of the bracket arms 29 which are provided with holes 13, 14, for that purpose.

The fulcrumed members 38 and 40 are connected by a link 39 that is pivoted thereto and constitutes the intermediate member of the compound lever. The compound levers provide valve-operating means beneath the top of the stove frame so as to be protected and not detract from the appear ance of the stove.

The tips l5 of the lever member 38 are bent toward each other and are provided on their top edges with notches 46 to engage slots 4-9 in the link 39, the lower end of which is pivoted by pin 50 to the weighted end of the lower lever member 40. By this construction of a compound lever, the lever can be located behind the front wall 28 of the stove and can be arranged around the air mixer 25, thus making it adaptable to a gas stove of minimum height and furthermore the U-shaped members of the lever act as lateral bracing and prevent lateral movement of the lever.

The weight 51 of the weighted lever 10 extends from arm to arm of the lever and is adjustable along the free arms of such lever; being clamped thereto by the clamp bar 52 and set screw 53.

he front end of the lower weighted lever 4L0 is provided at its middle with a slot 5 1 to receive a flange 55 that is adjustably mounted by thumb nuts 56, 57, on the screwthreaded stem 58 of the cutoff valve 21. By this method of connecting the lever with the valve stem any tendency to bind is avoided and a very delicate adjustment of the valve may be made. Said stem extends through a gland 59 that is screwed into the lower end of the valve head 9 and that is provided at its upper end with a valve seat 60 to fit the lower conical valve face 61. The advantage of this construction of the valve and valve seats 21, 2 1, 60 permits of relative adjustment of the valve seats toward and from one another and for the removal of the valve so that the valve tip 23 and valve face 61 and also the valve seats 2 1-, 60 can be readily re-ground.

As the lever member 40 moves on its fulcrum 42 it acts upon the flange 55 to move the valve up to cut off or tightly close the lower end of the gas-way 14 or down to open comi'uunication between such way and the bore of the jet plug or nozzle 11. The gas mixer 25 is fastened by four screws 62 to the bracket and one or more of said screws may be arranged to clamp the shutter 27 in set position. Bolts 63 passing through the top limb of the stove frame and through the ears 30 of the bracket fasten the bracket to the frame.

The weight 51 is normally adjusted in such position that it will readily tilt the spider 7 into the position shown in solid lines in Fig. 1, care being taken that the leverage is only sufficient to readily raise the front end of the spider and will allow it to descend whenever a cooking utensil is placed upon the spider.

The pilot light valve 19 is normally set to admit to the pilot pipe 20 the gas requisite to furnish the pilot light and when the valve 17 is open the pilot light must be nited; As soon as any utensil is placed upon the spider 7 above the burner b the rear end of the top lever member 38 will be depressed thereby raising the weight 51 and lowering the cut-off valve to open the passage to the bore of the nozzle 11; and the gas issuing from the burner b is then immediately ignited by the pilot light. When the utensil is removed from the spider the cut-off valve operates to close the upper valve seat 24. so that no further gas will escape. The cut-off valve therefore operates Cir under the toree ol the weight 51 to cut off the gas at the ,eat 2 t and operates under the weight ot the cooking utensil to close the cut-oll' valve at the Stilt (it). Thus leakage is always prevented without the use of any stalling box.

The lower edges ot the front wall of the bracl-ret are provided with vertical slots (il; to aceranmiulate the side arms of the weighted lower lever ll).

'il he top oi? the valve head i) is preferably rouiuled and the frame is provided with a rounded notch (.35 into which it seats, thus adding to the stability oi? the head.

The spider is provided with vertical laterally projecting knit'e edges (so below the spider su 'iporting lugs to contact: with the frame It to hold the spider in true position while it moves up and down, so as to avoid excessive Friction and bindii'ig between the frame and spider when the spider is moved up and down.

The lower tnlcrnmcd lever L0 is brought into adjustable operative relation to the valve by means of the adjustable flange in the slot at; and by moving the flange up or down on the valve stem, the upper lever lllfllllttl. 238 will be made to lift the trout edge of the spider to a greater or less height as may be required to seat the alve in. the gland exactly when the spider lugs seat on the. frame. By turning the screw 52 to loosen the clal'i'ip-lair 52 the weight 51 may be shifted to give the delicaev of operation required whcreb moderate weight on the ider will open. the valv. and yet the 'alve will le firmly SlttCfl in its seat 24; when the spider is free.

The flange is preferably circular so that it will always engage the slot tlniugh it is turned on the valve stem when the nuts are turned.

l claim z-- 1. In a gas saving device, a valve head provided with a gas-wzvv; a nozzle conr muni rating with the gas-way; a valve provided with two valve faces and a stem, one of said faces being adapted to close the valve-way; a glaml screwed intothe valve head to form a seat. tor the other valve lace; said stein extending through the gland; a llange ruljiuiitaljdy locked on said stem, a lever provided with a slot to engage said flange and a tilting spider to operate the lever.

In a gas saving device, the eombination with a tilting spider and, a burner beneath the spider, o'l. a. valve head pro'viijled with a. nozzle to supply the burner, a cutojl'l' valve in the head and a compound lever comprising a 't'ulcrnmed member engageiil b the spider, a 'tulcrumed member in operative relation. to the valve, a link connecting the linlernmed members and means to operate the compound lever to close the valve and tilt the spide' all ol said lever members being Ushaped.

it. The combination with a stove :l'ramc having notches in. its upper inner corners, ot a tilting spider provided at its edge with lugs projecting laterally into the notches, a burner beneath the spider, 1n ians to suppl v fuel to the burner, a. cnt-otl' valve for the gas supply, and means between the outoll valv and the tilting spider and operat able by the spider to operate the valve.

l. in a gas stove, the combination with a stove frame having notches in its inner corners, of a tilting spider provided with lugs to seat in said notches and vertical laterally projecting knile edges to contact the stove frame, a valve. and valve operating n1 .t'lllS between the tilting spider and the valve.

The combination with a. stove frame; of a. bracket provided with a. front vall, side arms normal to the front wall and ears at the top of the side arms secured to the. stove 't'rame; a valve head provided with a bore constituting a valve-wa and a gas-way and provided with a valve seat between the gas-way and valve-way: said head also being provided with a. hole lio' a gas nipple, two holes for plugs and a hole to: a pilot light valve: a gas nipple in said hole and longitiulii'iallv bored plugs in said two holes; said. longitudinally bored plugs being provided with heads and inserted through the bracket \'all and screwed into the head a valve to ('lOHf and open the bore in one of the bored plugs; a valve to open and close the valve seat in the valve head; a. lever pivoted to the bracket arms and o 'ieratablv connected with the 'alve; and a tilting spider mounted partly on the stove frame and partly on the lever to operate the lever.

(i. The rolnbinatimi with a valve head, or a. valve a bracket provided with an air opening; a gas mixer fastened to the bracket to receive air through the opening: axially bored headed 1 lugs passed through the bracket wall and screwtul into the valve head to hold the alve had and bracket together and to discharge gas through the bra ket into and inside the air mixer; and a shutter mounted concentric to one ol said bored plugs to close th air opening.

7. The combinatimi with a valve head, of a valve a bracket provided will air openings, a longitudinally bored headed plug inserted through the bracket and screwed into the valve head, a spacer around the plug to hold the valve 11 aid and the bracket apart, and a shutter journaled on the spacer to regulate the size of the air opening.

8. lit a gas saving attachment .l'or gas stoves having a tilting spider and a out oil" valve, a compound lever arranged between the spider and the valve and comprising my hand at Los Angeles, California, this 3d three bU-shape members; and two bracket day of November, 1910. arms etween which two of such members L 7 are fulcrumed one above the other, the third LEXVIS BEAR member pivotally connecting said fulcrumed In presence of members. JAMEs R. TOWNSEND? In testimony whereof I have hereunto set L. BELLE RICE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

